Hand pump



Sept. 6, 1966 s. HETTINGA HAND PUMP 2 Sheets-Sheet 1 Filed July 13, 1964l/v VEN 70 5/E50z r HEW/N64 5) W A4 $44444.

Sept. 6, 1966 s. HETTINGA 3,270,687

HAND PUMP Filed July 13, 1964 2 Sheets-Sheet 2 I IIIIIIIII I &

if i4? United States Patent 3,270,687 HAND PUMP Siebolt Hettinga, 734Washington, Pella, Iowa Filed July 13, 1964, Ser. No. 382,103 4 Claims.(Cl. 103-178) This invention relates to a pump and particularly to ahand operated pump for displacing flowable material.

It is the object of this invention to provide an improved hand operatedpump capable of moving flowable material such as liquids or semisolids.

Another object of the invention is to provide a hand operated pumphaving two relatively movable parts which are easily assembled anddismantled and do not require close manufacturing tolerances.

A further object of the invention is to provide a pump wherein theoperative parts can be assembled without the use of welds, bonds orcomplex attachment means.

Still another object of the invention is to provide a pump with aminimum number of working parts which can be individually replaced.

A further object of the invention is to provide a hand pump wherein onepart of the pump is usable as a calibrated tube.

An additional object of the invention is to provide a lightweight andportable pump which has low manufacturing cost, simplicity ofconstruction, and reliability of operation.

These and other objects and advantages of the invention will be evidentfrom reference to the following description and accompanying drawing,wherein:

FIG. 1 is a perspective view of the hand pump of this inventionpositioned in a container to displace a flowable material therefrom to asecond container;

FIG. 2 is an enlarged and foreshortened view taken along the line 2-2 ofFIG. 1 of the hand pump;

FIG. 3 is an enlarged exploded perspective view of one of the checkvalves and valve holders of the pump of FIG. 1;

FIG. 4 is an enlarged sectional view taken along the line 4-4 of FIG. 1;

FIG. 5 is an enlarged sectional view of the valve assemblies of the pumpof FIG. 1 showing the position of the check valves on the upstroke ofthe pump;

FIG. 6 is a view similar to FIG. 5 showing the position of the checkvalves on the downstroke of the pump;

FIG. 7 is an elevational view of the outer tubular member of the pump ofFIG. 1 used as a calibrated tube to remove a measured volume of flowablematerial from a container;

FIG. 8 is an enlarged sectional view taken along the line 8-8 of FIG. 7;and

FIG. 9 is a sectional view taken along the line 99 of FIG. 7.

Referring to the drawing there is shown in FIG. 1, the hand pump of thisinvention indicated generally at 15 and extended axially into a drum orcontainer 16. A flowable material 17, such as a liquid or a semisolid isconfined in the drum. The lower section of the hand pump 15 projectsinto the material 17 so that upon operation of the pump the material isdisplaced from the drum 16 into a pail 18.

The hand pump 15 (FIG. 2) comprises a straight outer tubular member 19having an inlet end section 21 and an end section 22. A passage 23extends longitudinally through the tubular member 19 which is formedfrom a clear or transparent plastic material. Indicia 24 are formed inthe side wall of the member 19 along the length thereof for calibratingthe member 19 in volume units.

Attached to the inlet section is a one-way valve unit 26 operable toonly allow flowable material into the tubular member 19. As shown inFIG. 3, the valve unit 26 comprises a check valve 27 formed from a flatflexible plastic material so as to have a round body portion 29 and aconcentrically spaced peripheral section 28 connected with the valveportion 29 by a neck member 31. Thus the outer peripheral edge of thedisc valve portion 29 is concentrically spaced from the peripheralsection 28 to define therewith an arcuate slot 32 the ends of which areat the neck 31.

The check valve 27 is held in a sealed relation with the end 21 of thetubular member 19 by a valve holder indicated generally at 33 (FIG. 3).The valve holder 33 is a substantially cup shape one-piece member havinga flat bottom wall 34 of a cylinder shape formed with a central hole 36of a diameter smaller than the diameter of the disc valve or bodyportion 29. Secured to the top side of the bottom wall 34 is acylindrical sleeve or upright wall 37 concentrically spaced about thehole 36 and inwardly from the outer periphery of the bottom wall 34. Theouter peripheral section of the bottom wall thus forms a laterallyextended annular flange relative to the lower end of the sleeve orupright wall 37. The wall of the cylindrical sleeve 37 is interruptedwith a longitudinally extended slot 38 of a width slightly greater thanthe width of the neck 31 of the check valve 27. The valve 26 is thusassembled with the valve holder 33 by aligning the neck 31 with the slot38 for reception of wall 37 within the slot 32.

With the valve 26 thereon the cylindrical sleeve 37 (FIG. 2) is insertedinto the bore or passage 23 of the tubular member 19 at the inlet end 21thereof in a press fit with the side wall of the passage 23. With thesleeve thus inserted the peripheral section 28 of the check valve 27 isclamped in a fluid sealed relation between the peripheral section of thebottom wall 34 and the terminal edge of the inlet end 21 of the tubularmember 19. The disc valve 29 being larger than the hole 36 in the valveholder 33 is engageable with that portion of the bottom wall 34 withinthe sleeve 37 so as to be flexed at the neck 31 into and out of acovering or closing position with the hole 36.

As shown in FIGS. 1 and 2, an inner tubular member 39 having a linearinlet section 41 and a curved outlet section 42 is telescoped into theouter tubular member 19. The passage or bore 43 of the tubular member 39accommodates a flexible plastic hose 44 the inner end of which carries acup-shaped washer 46 to maintain the circular shape thereof. Theflexible hose 44 projects from the outlet end section 42 and functionsto increase the effective length of the inner tubular member 39. Anannular plastic ring 47 attached to the end of the outlet section 42 isengageable with the hose 44 to form therewith a fluid seal.

The linear inlet section 41 of the tubular member 39 is of a diameterless than the inside diameter of the outer tubular member 19 so as to befreely telescopic within the member 19. A collar 48 secured about thetubular member 39 limits the movement of the tubular member 39 into thetubular member 19. The outer peripheral surface of the collar 48 istapered and functions as a wedge relative to the end section 22 of thetubular member 19 to limit the movement of the tubular member 39 withinthe tubular member 19.

A one-way valve unit 49 attached to the inner end of the inlet section41 of the tubular member 39 is identical in construction to the valveunit 26 for the tubular member 19. A check valve 51 is held in a sealedrelation with the inner end of the tubular member 39 by a cup-shapedvalve holder 52. The check valve 51 has a disc valve or round bodyportion 53 movable into and out of a closing position with a hole 54 inthe valve holder 52 which is inserted in a press fit within the tubularmember 39 to hold the valve unit 49 on the tubular member 39.

As shown in FIG. 4, the disc valve 53 is located within the valve holder52 and is connected to the peripheral section of the check valve 51 by aflexible neck 56 for up and down movement relative to the hole 54.

To displace a flowable material 17 from the drum 16 into the pail 18,the pump is positioned in the material as shown in FIG. 1 and theflexible hose 44 is extended from the tubular member 39 and its outletend placed in the pail 18. The tubular member 39 is manuallyreciprocated into and out of the tubular member 19 to effect a pumpingaction. In use the operator places one hand on the section 22 of thetubular member 19 and the other hand on the curved section 42 of thetubular member 39 and alternately applies pull and push forces toreciprocate the tubular member 39 relative to the tubular member 19.

As shown in FIG. 5, when the tubular member 39 is moved in an upwarddirection relative to the tubular member 19, as shown by the arrow 57,the disc valve 53 of the valve unit 4-9 is in a closed relation withrespect to the hole 54 in the valve holder 52. Concurrently the discvalve 29 of the valve unit 26 is moved to an open position relative tothe hole 36 in the valve holder 33 due to the reduction of pressure inthe passage 23 caused by the movement of the tubular member 39 relativeto the tubular member 19. With the disc valve 29 open the flowablematerial from the drum 16 moves through the hole 36 into the passage 23in a following relation with the inlet end section 41 of the member 39.The flowable material located in the passage 23 between the side wallsof the tubular members 19 and 39 and the engagement of the peripheralsection of the check valve 51 with the inner wall of the tubular member19 acts as seals to eliminate the flow of air between the tubularmembers 19 and 39.

As shown in FIG. 6, when the tubular member 39 is pushed in a downwarddirection, indicated by the arrow 58, into the tubular member 19 thedisc valve 29 moves into a sealed relation with the hole 36 trapping theflowable material in the passage 23. This trapped material in thepassage 23 forces the disc valve 53 in an upward direction to permit theflow thereof through the hole 54 and into the passage 43 of the innertubular member 39. From the passage 43 flow takes place through flexiblehose 44- for delivery of the flowable material to the pail 18.

This sequence of operations of the check valves 29 and 53 is repeatedduring each push and pull cycle of the ,pump. When the desired amount offlowable material is removed from the drum 16 the tubular member 39 isfrictionally locked in the in position by forcing the collar 48 into theouter end section 22 of the tubular member 19. The flexible hose 44 isthen retracted within the tubular member 39 to facilitate handling ofthe pump 15 for transport and storage purposes.

Referring to FIG. 7, there is shown the tubular member 19 being used asa calibrated tube to remove specific volumes of flowable material 59from a container 61. For this purpose the inner tubular member 39 hasbeen removed from the outer tubular member 19 so as to leave open theouter end section 22 of the member 19.

In use the inlet end section 21 carrying the valve unit 26 is insertedinto a container 6 1 for a flowable material 59. As the tubular member19 is lowered into the flowable material 59 the disc valve 29 is movedto an open position relative to the hole 36 in the valve holder 33, asshown in broken lines in FIG. 8. With the disc valve 29 in the openposition the flowable material 59 moves through the hole 36 up into thepassage 23 until the level of the flowable material in the passage 23reaches a desired point with respect to the volume indicia 24. Ontermination of the downward movement of the tubular member 19 the discvalve 29 moves into a closed position with the hole 36 thereby trappingthe desired volume of material in the tubular member 19. The tubularmember 19 is then removed from the container 61 and emptied of themeasured amount of flowable material by pouring the material out of theouter end section 22.

In summary the hand pump 15 has two relatively movable tubular members29 and 39. A one-way valve unit 26 is attached to the inlet end of thetubular member 19 and a one-way valve unit 49 is attached to the inletend of the tubular member 39. The tubular member 39 and its valve 49 aretelescoped into the tubular member 19, to form a relatively loose fittherewith. In operation the flowable material is interposed in the spacebetween the tubular members 19 and 39 and functions as a lubricant andseal during the relative reciprocal movement between the members 19 and39. This relative reciprocal movement sequentially operates the one-wayvalve units 26 and 49 to permit the flowable material to enter thepassage 23 in the tubular member 19 and subsequently transpose thisflowable material into the passage 43 of the tubular member 39. Thisaddition of flowable material into the passage 43 forces the flowablematerial initially in the passage 43 into the flexible discharge hose44.

The entire hand pump 15 is illustrated as being formed from plasticmaterial. While this is the preferred construction it is not intended tobe limited to this type of material.

While there have been shown, described, and pointed out the fundamentalnovel features of the invention it will be understood that variousomissions, substitutions, changes in form, and details of the hand pumpillustrated may be made by those skilled in the art without departingfrom the spirit of the invention which is intended to be limited only asindicated by the scope of the following claims.

I claim:

1. A hand operated pump comprising:

(a) a first tubular member having an inlet end and an opposite endconnected together with a passage means,

( b) first valve means including a check valve having a movable centerportion and a peripheral portion and a seat member for holding theperipheral portion of the check valve in a sealed relation with theinlet end of the first tubular member, said seat member coacting withthe center portion of the check valve to permit the flow of a flowablematerial into said inlet end,

(0) a second tubular member having an inlet end and an outlet endconnected together with a passage means, said second tubular memberbeing slidably telescoped within the first tubular member,

(d) second valve means including a check valve having a movable centerportion and a peripheral portion and a seat member for holding theperipheral portion of the check valve in a sealed relation with theinlet end of the second tubular member, said seat member coacting withthe center portion of the check valve to allow the flow of the flowablematerial into the second tubular member, whereby on movement of thesecond tubular member out of the first tubular member the flowablematerial is moved through the first valve means into the first tubularmember and on movement of the second tubular member into the firsttubular member the flowable material is moved from the first tubularmember through the second valve means into the second tubular member fordischarge from the opposite end thereof,

(e) stop means on said second tubular means for limiting the movement ofthe second tubular means into the first tubular means, and

(f) hose means slidably positioned in said second tubular member, saidhose means being movable relative to said second tubular member to varythe effective length of said second tubular member.

2. A pump comprising:'

(a) a first tubular member having an inlet end and an opposite end,

(b) first valve means attached to the inlet end of the first tubularmember and operable to only allow the flow of a flowable material intothe first tubular member,

(0) a second tubular member having an inlet end and an outlet end, saidsecond tubular member being slidably telescoped within the first tubularmember,

(d) second valve means attached to the inlet end of the second tubularmember and operable to only allow the flow of the flowable material intothe second tubular member whereby on movement of the second tubularmember outwardly of the first tubular member the flowable material ismoved through the first valve means into the first tubular member and onmovement of the second tubular member inwardly of the first tubularmember the flowable material is moved from the first tubular memberthrough the second valve means and into the second tubular member fordischarge from the opposite end thereof, and

(e) hose means slidably positioned in said second tubular member, saidhose means being movable relative to said second tubular member to varythe effective length of said second tubular member.

3. In a pump,

(a) a first tubular member having an axial bore with a side wall, aninlet end operably associated with a check valve unit, and an oppositeend,

(b) a second tubular member telescoped within said first tubular memberfor inward and outward movement relative to said opposite end thereof,said second tubular member having an inlet end within said first tubularmember and an outlet end,

(c) a check valve unit for the inlet end of said second tubular membercomprising (d) a cup-shaped member having a bottom wall and an uprightside wall, said bottom wall having a central opening and an annularflange portion extended laterally from said side wall, and said uprightwall having a longitudinally extended slot therein, and

(e) a valve member of a disc shape having a round body portion and aperipheral section spaced from said body portion and connected theretoby a flexible neck section, said neck section and upright wall beingreceivable, respectively, within said slot and space to position saidbody portion over the opening in said bottom wall, and said upright sidewall being receivable within the inlet end of said second tubular memberto a position providing for the clamping of said peripheral sectionbetween the terminal edge of said inlet end and said flange, and for thecontact engagement of the outer edge of said peripheral section with theside wall of said bore.

4. In a pump including:

(a) a tubular member having an inlet end,

(b) a valve unit for opening and closing said inlet end comprising (c) acup-shaped member having a bottom wall and an upright side wall, saidbottom wall having a central opening and an annular flange portionextended laterally from said side wall, and said upright wall having alongitudinally extended slot therein, and

(d) a valve member of a disc shape having a round body portion and aperipheral section spaced from said body portion and connected theretoby a flexible neck section, said neck section and upright wall beingreceivable, respectively, within said slot and space to position saidbody portion over the opening in said bottom wall, and said upright sidewall being receivable within said inlet end to a position providing forthe clamping of said peripheral section between the terminal edge ofsaid inlet end and said flange.

References Cited by the Examiner UNITED STATES PATENTS 29,424 7/1860Warner 103-488 35,108 4/1862 Palmer 103-188 736,062 8/1903 Bonham103-188 743,299 11/1903 Lewis 222-158 X 2,798,647 7/1957 Broadwin222-158 X WARREN E. COLEMAN, Examiner.

MARK NEWMAN, Primary Examiner.

1. A HAND OPERATED PUMP COMPRISING: (A) A FIRST TUBULAR MEMBER HAVING ANINLET END AND AN OPPOSITE END CONNECTED TOGETHER WITH A PASSAGE MEANS,(B) FIRST VALVE MEANS INCLUDING A CHECK VALVE HAVING A MOVABLE CENTERPORTION AND A PERIPHERAL PORTION AND A SEAT MEMBER FOR HOLDING THEPERIPHERAL PORTION OF THE CHECK VALVE IN A SEALED RELATION WITH THEINLET END OF THE FIRST TUBULAR MEMBER, SAID SEAT MEMBER COACTING WITHTHE CENTER PORTION OF THE CHECK VALVE TO PERMIT THE FLOW OF A FLOWABLEMATERIAL INTO SAID INLET END, (C) A SECOND TUBULAR MEMBER HAVING ANINLET END AND AN OUTLET END CONNECTED TOGETHER WITH A PASSAGE MEANS,SAID SECOND TUBULAR MEMBER BEING SLIDABLY TELESCOPED WITHIN THE FIRSTTUBULAR MEMBER, (D) SECOND VALVE MEANS INCLUDING A CHECK VALVE HAVING AMOVABLE CENTER PORTION AND A PERIPHERAL PORTION AND A SEAT MEMBER FORHOLDING THE PERIPHERAL PORTION OF THE CHECK VALVE IN A SEALED RELATIONWITH THE INLET END OF THE SECOND TUBULAR MEMBER, SAID SEAT MEMBERCOACTING WITH THE CENTER PORTION OF THE CHECK VALVE TO ALLOW THE FLOW OFTHE FLOWABLE MATERIAL INTO THE SECOND TUBULAR MEMBER, WHEREBY ONMOVEMENT OF THE SECOND TUBULAR MEMBER OUT OF THE FIRST TUBULAR MEMBERTHE FLOWABLE MATERIAL IS MOVED THROUGH THE FIRST VALVE MEANS INTO THEFIRST TUBULAR MEMBER AND ON MOVEMENT OF THE SECOND TUBULAR MEMBER INTOTHE FIRST TUBULAR MEMBER THE FLOWABLE MATERIAL ID MOVED FROM THE FIRSTTUBULAR MEMBER THROUGH THE SECOND VALVE MEANS INTO THE SECOND TUBULARMEMBER FOR DISCHARGE FROM THE OPPOSITE END THEREOF, (E) STOP MEANS ONSAID SECOND TUBULAR MEANS FOR LIMITING THE MOVEMENT OF THE SECONDTUBULAR MEANS INTO THE FIRST TUBULAR MEANS, AND (F) HOSE MEANS SLIDABLYPOSITIONED IN SAID SECOND TUBULAR MEMBER, SAID HOSE MEANS BEING MOVABLERELATIVE TO SAID SECOND TUBULAR MEMBER TO VARY THE EFFECTIVE LENGTH OFSAID SECOND TUBULAR MEMBER.